1. Fill in the blanks
a. Green plants are called -----------------, since they synthesize their own food.
b. Oxygen is released by plants during ------------------.
c. -------------------- live on dead and decaying animals.
d. -------------------- is the green coloured pigments present in leaves.
e. The food synthesized by the plants is stored as -------------------.
a. Green plants are called -----------------, since they synthesize their own food.
b. Oxygen is released by plants during ------------------.
c. -------------------- live on dead and decaying animals.
d. -------------------- is the green coloured pigments present in leaves.
e. The food synthesized by the plants is stored as -------------------.
(a) Autotrophs (b) photosynthesis (c) saprophytes
(d) chlorophylls(e) starch
2. Write T for true and F for false statements.
a. Plants obtain nitrogen from soil.
b. Human being is an omnivorous organism.
c. Plant intake carbon dioxide during respiration.
d. Solar energy is captured by leaves.
e. Mushroom is a saprophytic organism.
(a) T (b) T(c) F (d) T (e) T.
2. Write T for true and F for false statements.
a. Plants obtain nitrogen from soil.
b. Human being is an omnivorous organism.
c. Plant intake carbon dioxide during respiration.
d. Solar energy is captured by leaves.
e. Mushroom is a saprophytic organism.
(a) T (b) T(c) F (d) T (e) T.
3. Fill the blanks with suitable words.
a. During photosynthesis, solar energy is trapped by the pigment called -----------.
b. -------------- is the ultimate source of energy.
c. Gas released during photosynthesis is --------------------.
d. Plant eating animals are called ----------------.
e. Minute pores on leaf surface for exchange of gases are known as --------------.
(a) Chlorophyll (b) Sun(c) Oxygen (d) Herbivores (e) Stomata.
4. What are Heterotrophs? Give two examples
Ans.The living organisms that obtain their food directly or indirectly from plants are called
Heterotrophs. It includes all animals, human, dog and horse.
5.What are nutrients? Name main nutrients
ans.The components of food that provides us energy to work, to grow and gives us
resistance against disease are called nutrients. Main nutrients are carbohydrates, fats,
proteins, vitamins and minerals
6.Why is sun said to be ultimate source of energy?
ans.Sun is the ultimate source of energy as all organisms obtain their food from plants and
plants obtain energy from sun during photosynthesis. The energy present in coal and
petroleum are also from sun
7.Name the following.
a. A parasitic plant which is devoid of leaves, having yellow, slender tubular stem.
b. A solution used to test the presence of carbohydrates.
c. A plant that has both autotrophic and heterotrophic nutrition.
d. The by which organism obtain energy from the digested food.
Ans.(a) Cuscuta
(b) Iodine solution
(c) Pitcher plant
(d) Respiration.
8.What is the mode of nutrition in plants?
Ans.The mode of nutrition in plants is autotrophic. Plants prepare their food by the
process of photosynthesis using inorganic substance.
9.What is symbiotic relationship? How it benefits the organisms?
Ans.It is the relationship between two organisms in which both organisms get benefited
from each other. Symbiotic relationship between algae and fungi is called lichen.
10. Why green leaf is boiled in alcohol before testing it for starch.
Ans.Green leaf is boiled in alcohols for testing the starch to dissolve the chlorophyll
present in the leaves. After boiling in alcohols leaf will lose its green colour.
11.What is photosynthesis?
Ans.The process by which green plants synthesis their food using sunlight, carbohydrates,
water and chlorophyll is called photosynthesis.
12. Distinguished between parasite and saprophytes.
Ans.Those organisms that obtain their food from other organism by harming them are
called parasite. For example-Cuscuta, lice, mosquito. Those organisms that obtain food
from dead and decaying materials are called saprophytes. For example- bacteria and
fungi.
13. What are insectivorous plants? Give two examples.
Ans.Those plants that eat insects by trapping them are called insectivorous plants. They
obtain protein from insects. For example- Pitcher plants and Drosophila.
14.What is parasitic nutrition? Give two examples.
Ans.It is a type of heterotrophic nutrition in which one organism obtains their food from
other organism by harming them but not killing. The organism that obtains food is
called parasite and other organism is called host. Cuscuta, mosquito.
15. Name the raw materials required for photosynthesis.
Ans.Following thing are required for photosynthesis:
a. Carbon dioxide
b. Water
c. Chlorophyll
d. Sunlight
16. Why do organisms need to take food?
Ans.Organisms need food to obtain energy for various metabolic activities and to maintain
the body parts for wear and tear. It also provides nutrients for protection against the
disease.
a. During photosynthesis, solar energy is trapped by the pigment called -----------.
b. -------------- is the ultimate source of energy.
c. Gas released during photosynthesis is --------------------.
d. Plant eating animals are called ----------------.
e. Minute pores on leaf surface for exchange of gases are known as --------------.
(a) Chlorophyll (b) Sun(c) Oxygen (d) Herbivores (e) Stomata.
4. What are Heterotrophs? Give two examples
Ans.The living organisms that obtain their food directly or indirectly from plants are called
Heterotrophs. It includes all animals, human, dog and horse.
5.What are nutrients? Name main nutrients
ans.The components of food that provides us energy to work, to grow and gives us
resistance against disease are called nutrients. Main nutrients are carbohydrates, fats,
proteins, vitamins and minerals
6.Why is sun said to be ultimate source of energy?
ans.Sun is the ultimate source of energy as all organisms obtain their food from plants and
plants obtain energy from sun during photosynthesis. The energy present in coal and
petroleum are also from sun
7.Name the following.
a. A parasitic plant which is devoid of leaves, having yellow, slender tubular stem.
b. A solution used to test the presence of carbohydrates.
c. A plant that has both autotrophic and heterotrophic nutrition.
d. The by which organism obtain energy from the digested food.
Ans.(a) Cuscuta
(b) Iodine solution
(c) Pitcher plant
(d) Respiration.
8.What is the mode of nutrition in plants?
Ans.The mode of nutrition in plants is autotrophic. Plants prepare their food by the
process of photosynthesis using inorganic substance.
9.What is symbiotic relationship? How it benefits the organisms?
Ans.It is the relationship between two organisms in which both organisms get benefited
from each other. Symbiotic relationship between algae and fungi is called lichen.
10. Why green leaf is boiled in alcohol before testing it for starch.
Ans.Green leaf is boiled in alcohols for testing the starch to dissolve the chlorophyll
present in the leaves. After boiling in alcohols leaf will lose its green colour.
11.What is photosynthesis?
Ans.The process by which green plants synthesis their food using sunlight, carbohydrates,
water and chlorophyll is called photosynthesis.
12. Distinguished between parasite and saprophytes.
Ans.Those organisms that obtain their food from other organism by harming them are
called parasite. For example-Cuscuta, lice, mosquito. Those organisms that obtain food
from dead and decaying materials are called saprophytes. For example- bacteria and
fungi.
13. What are insectivorous plants? Give two examples.
Ans.Those plants that eat insects by trapping them are called insectivorous plants. They
obtain protein from insects. For example- Pitcher plants and Drosophila.
14.What is parasitic nutrition? Give two examples.
Ans.It is a type of heterotrophic nutrition in which one organism obtains their food from
other organism by harming them but not killing. The organism that obtains food is
called parasite and other organism is called host. Cuscuta, mosquito.
15. Name the raw materials required for photosynthesis.
Ans.Following thing are required for photosynthesis:
a. Carbon dioxide
b. Water
c. Chlorophyll
d. Sunlight
16. Why do organisms need to take food?
Ans.Organisms need food to obtain energy for various metabolic activities and to maintain
the body parts for wear and tear. It also provides nutrients for protection against the
disease.
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